AutoMac
CB750 Member
The single disc fitted to my CB 750 A started dragging and squealing when the front brake was applied, I ride all year round so figured salt used on the UK winter roads, brake dust or just in need of refreshing and the machine is trying to tell me.
So I have rebuilt the master cylinder with a repair kit, changed the brake hose for a HEL braided item and fitted a new stainless steel piston and seal in the calliper.
I had removed the brake calliper off the bike to do this work and found the old piston was well and truly seized, even compressed air didn’t move the pad / piston out.
Eventually I got them out using a blow torch to warm the calliper body and an air compressor. After half an hour of warm up and air the piston popped out suddenly .
I caught it in her in doors best oven gloves. (she will never know)
I have now cleaned the pistons cylinder and fitted a new stainless steel piston and new seal .
The new brake pads are after market EBC . I had to drill the tiny hole in the back plate of the static pad a little larger so I could get a new split pin through to hold the pad in place on the back plate as standard fitting . .
The moving piston side has nothing holding the pad in place other than a steel roll pin which sits in a notch in the top of the brake pad allowing it to slide back and forth but not rotate when braking.
The new pads are made by EBC and they came with a tiny grub screw.
I didn’t see one holding the old piston side pad in place but it did come out rather quickly.
It’s like putting flat pack furniture together and you have something left over, I sat looking at this tiny grub screw and replayed in my head the sequence of putting it all back together. And cannot see where this small grub screw would go.
But have I missed something has it all got to be drained of fluid and come apart again ?. It could be the pads also fit another Honda in the CB range which uses the grub screw .
Have I missed something ?
So I have rebuilt the master cylinder with a repair kit, changed the brake hose for a HEL braided item and fitted a new stainless steel piston and seal in the calliper.
I had removed the brake calliper off the bike to do this work and found the old piston was well and truly seized, even compressed air didn’t move the pad / piston out.
Eventually I got them out using a blow torch to warm the calliper body and an air compressor. After half an hour of warm up and air the piston popped out suddenly .
I caught it in her in doors best oven gloves. (she will never know)
I have now cleaned the pistons cylinder and fitted a new stainless steel piston and new seal .
The new brake pads are after market EBC . I had to drill the tiny hole in the back plate of the static pad a little larger so I could get a new split pin through to hold the pad in place on the back plate as standard fitting . .
The moving piston side has nothing holding the pad in place other than a steel roll pin which sits in a notch in the top of the brake pad allowing it to slide back and forth but not rotate when braking.
The new pads are made by EBC and they came with a tiny grub screw.
I didn’t see one holding the old piston side pad in place but it did come out rather quickly.
It’s like putting flat pack furniture together and you have something left over, I sat looking at this tiny grub screw and replayed in my head the sequence of putting it all back together. And cannot see where this small grub screw would go.
But have I missed something has it all got to be drained of fluid and come apart again ?. It could be the pads also fit another Honda in the CB range which uses the grub screw .
Have I missed something ?
